servlet中的代码

package fund.apply_pay_expenses;

import javax.servlet.http.*;
import javax.servlet.*;
import java.io.* ;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;

import include.nseer_db.*;

public class check_oka extends HttpServlet {

	/**
	 * 
	 */  
	private static final long serialVersionUID = 1L;

	/**
	 * Constructor of the object.
	 */
	public check_oka() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public synchronized void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		HttpSession dbSession = request.getSession();
		HttpSession session = request.getSession();
		ServletContext dbApplication = dbSession.getServletContext();
		response.setContentType("text/html;charset=UTF-8");
		request.setCharacterEncoding("UTF-8");
		response.setHeader("Cache-Control", "no-cache");
		PrintWriter out = response.getWriter();
		
        nseer_db_backup1 sellsystem_db = new nseer_db_backup1(dbApplication);
    	String failing;
    	try{
    		
    		if(sellsystem_db.conn((String)dbSession.getAttribute("unit_db_name"))){
    			String name=request.getParameter("name");//发送人
    			String time=request.getParameter("time");//发送时间
    			String message=request.getParameter("bio");//发送内容
    			String title=request.getParameter("title");
    			//String a=title+message+time; ---如果要想在主信息中插入多条信息，则可以相加其在插入。
    			//--------复选框----------
    			String phone=request.getParameter("cbxa");
    			String email=request.getParameter("email");//-----但选择邮件是获取邮件的地址
    			String inmessage=request.getParameter("cbxc");

    			
    			String sql="insert into message(name,time,message,phone,email,inmessage,title) values('"+name+"','"+time+"','"+message+"','"+phone+"','"+email+"','"+inmessage+"','"+title+"')";
    			sellsystem_db.executeUpdate(sql);//执行sql
    			//System.out.println(sql);
    			
    			int i=sellsystem_db.getState();
    			if (i > 0) {
    				failing ="{success:true, file:'成功'}";
    			} else {
    				failing ="{success:true, file:'失败'}";
    			}
    			out.print(failing);
    			
    		}else{
    			response.sendRedirect("error_conn.htm");
    		}
    		sellsystem_db.commit();
			}catch (Exception ex){
    		  ex.printStackTrace();
    		}finally{
      		  try{
      			sellsystem_db.close();
      		  }catch(Exception e){
      			  e.printStackTrace();
      		  }    			
    		}
    		//out.flush();
    		//out.close();
}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}